2026-07-01: Landing gear

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2026-07-01 Bombardier Inc.: Amendment 39-23296; Docket No. FAA-2025-1732; Project Identifier MCAI-2024-00249-T. (a) Effective Date This airworthiness directive (AD) is effective May 8, 2026. (b) Affected ADs None. (c) Applicability This AD applies to all Bombardier Inc. airplanes, certificated in any category, identified in paragraphs (c)(1) through (3) of this AD. (1) Model CL-600-1A11 (600) airplanes. (2) Model CL-600-2A12 (601) airplanes. (3) Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. (d) Subject Air Transport Association (ATA) of America Code 32, Landing gear. (e) Unsafe Condition This AD was prompted by a report of uncommanded nose wheel steering upon landing with touchdown on the runway centerline. The FAA is issuing this AD to address uncommanded nosewheel steering due to loose nosewheel steering rudder pedal potentiometer universal coupling setscrews. The unsafe condition, if not addressed, could lead to a runway excursion. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Replacement of Universal Coupling and Nosewheel Steering Rudder Pedal Potentiometer Universal Coupling Setscrews For airplanes identified in paragraphs (g)(1) through (5) of this AD: Within 36 months or 1,400 flight hours, whichever occurs first, after the effective date of this AD, replace the nosewheel steering rudder pedal potentiometer universal coupling setscrews (self-locking setscrews) in accordance with Sections 2.B.(3) and 2.C. of the Accomplishment Instructions in the applicable service bulletin identified in paragraphs (g)(1) through (5) of this AD. (1) For Model CL-600-1A11 (600) airplanes, serial numbers 1004 through 1085 inclusive, on which the actions in Part E of Canadair Challenger Service Bulletin 600-0380, Revision 02, have been completed: Bombardier Service Bulletin 600-0782, dated October 30, 2023. Note 1 to paragraph (g)(1): This note applies to paragraphs (g)(1) and (h)(1) of this AD. These airplanes are also referred to by the marketing designation Challenger 600. (2) For Model CL-600-2A12 (601) airplanes, serial numbers 3001 through 3059 inclusive, on which the actions in Part D of Canadair Challenger Service Bulletin 601-0092, Revision 01 have been completed, and serial numbers 3060 through 3066 inclusive; and Model CL-600-2B16 (601-3A and 601-3R Variants) airplanes, serial numbers 5001 through 5194 inclusive: Bombardier Service Bulletin 601-1114, dated October 30, 2023. Note 2 to paragraph (g)(2): This note applies to paragraphs (g)(2), (h)(2), and (h)(3) of this AD. These airplanes are also referred to by the marketing designation Challenger 601. (3) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 5301 through 5665 inclusive: Bombardier Service Bulletin 604-32-033, dated October 30, 2023. Note 3 to paragraph (g)(3): This note applies to paragraphs (g)(3) and (h)(4) of this AD. These airplanes are also referred to by the marketing designation Challenger 604. (4) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 5701 through 5990 inclusive: Bombardier Service Bulletin 605-32-010, dated October 30, 2023. Note 4 to paragraph (g)(4): This note applies to paragraphs (g)(4) and (h)(5) of this AD. These airplanes are also referred to by the marketing designation Challenger 605. (5) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 6050 through 6193 inclusive: Bombardier Service Bulletin 650-32-007, dated October 30, 2023. Note 5 to paragraph (g)(5): This note applies to paragraphs (g)(5) and (h)(6) of this AD. These airplanes are also referred to by the marketing designation Challenger 650. (h) Maintenance/Inspection Program Revision Within 60 days after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information in the applicable temporary revision identified in paragraphs (h)(1) through (6) of this AD. The initial compliance time for the replacement is within 96 months after the replacement required by paragraph (g) of this AD. Using a different document with information identical to the information in the applicable temporary revision identified in paragraphs (h)(1) through (6) of this AD is acceptable for compliance with the requirements of this paragraph. (1) For all Model CL-600-1A11 (600) airplanes: Bombardier Challenger 600 Time Limits/Maintenance Checks (TLMC) Temporary Revision (TR) No. TR 5-165, dated October 25, 2023. (2) For all Model CL-600-2A12 (601) airplanes: Bombardier Challenger 601 TLMC TR No. TR 5-269, dated October 25, 2023. (3) For all Model CL-600-2B16 airplanes (601-3A and 601-3R Variants): Bombardier Challenger 601 TLMC TR No. TR 5-283, dated October 25, 2023. (4) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 5301 through 5665 inclusive: Bombardier Challenger 604 TLMC TR No. 5-2-73, dated October 25, 2023. (5) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 5701 through 5990 inclusive: Bombardier Challenger 605 TLMC TR No. 5-2-29, dated October 25, 2023. (6) For Model CL-600-2B16 (604 Variant) airplanes, serial numbers 6050 and subsequent: Bombardier Challenger 650 TLMC TR No. 5-2-5, dated October 16, 2023. (i) Additional AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: AMOC@faa.gov. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, International Validation Branch, FAA; or Transport Canada; or Bombardier's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (j) Additional Information For more information about this AD, contact John Massey, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) Bombardier Challenger 600 Time Limits/Maintenance Checks (TLMC) Temporary Revision (TR) No. TR 5-165, dated October 25, 2023. (ii) Bombardier Challenger 601 TLMC TR No. TR 5-269, dated October 25, 2023. (iii) Bombardier Challenger 601 TLMC TR No. TR 5-283, dated October 25, 2023. (iv) Bombardier Challenger 604 TLMC TR No. 5-2-73, dated October 25, 2023. (v) Bombardier Challenger 605 TLMC TR No. 5-2-29, dated October 25, 2023. (vi) Bombardier Challenger 650 TLMC TR No. 5-2-5, dated October 16, 2023. (vii) Bombardier Service Bulletin 600-0782, dated October 30, 2023. (viii) Bombardier Service Bulletin 601-1114, dated October 30, 2023. (ix) Bombardier Service Bulletin 604-32-033, dated October 30, 2023. (x) Bombardier Service Bulletin 605-32-010, dated October 30, 2023. (xi) Bombardier Service Bulletin 650-32-007, dated October 30, 2023. (3) For Bombardier material identified in this AD, contact Bombardier Business Aircraft Customer Response Center, 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone 514-855-2999; email ac.yul@aero.bombardier.com; website https://my.bombardier.com. (4) You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email fr.inspection@nara.gov. Issued on March 24, 2026. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2026-06506 Filed 4-2-26; 8:45 am]BILLING CODE 4910-13-P